Automatic marking device



April 13, 1937.- e. RASHMAN 2,077,106

' AUTOMATIC MARKING DEVICE lfiled Sept. 5, 1936 2 Sheets-Sheet 1 7 v lz m m v l 40 7 A3 V I v I F6 I- INVENTOR ATTORNEY G. L. RASH MAN AUTOMATIC MARKING DEVICE Filed Sept 5, 1936 April 13, 1937.

2 Sheets-Sheet 2 INVENTOR GQEOQA/A. P86160764! ATTORNEY Patented Apr. 13, 1937 UNETEE STATES AUTOMATIC MARKING DEVICE Gordon L. Rashman, Milwaukee, Wis., assignor to Rhea Manufacturing Company, Milwaukee,

Wis.

Application September 9 Claims.

This invention relates to automatic marking drills, and more particularly to a drill of the type employed to bore through multiple thicknesses of fabric in the manufacture of garments and the like so as to mark uniform points in the various pieces of fabric.

An object of the invention is to provide a device of the type which will enable an operator to bore through a plurality of layers of fabric in a substantially vertical line, thus obtaining a consistently uniform marking of many layers of cloth. Other devices of the type now in use are not accurate because of a lack of means for precision guidance of the same. Another object of the invention is to provide a drill coupled with electrical devices for terminating its operation immediately upon the deviation of the tool from a perfect vertical alignment.

Another object of the invention is to provide a drill having individual directional electrical switches and means for individual adjustment of the same.

Other and further objects of the invention will appear as the description proceeds, reference being had to the accompanying drawings, in which:-

Fig. 1 is a side view in elevation and partly in section of a drill embodying my invention.

Fig. 2 is a view taken on line 22 of Fig. 1.

Fig. 3 is a view taken on line 33 of Fig. 1.

Fig. 4 is a fragmentary view, partly in section and partly in elevation, showing one of the mercury switches.

Fig. 5 is a wiring plan for the switches and motor utilized in the device. v)

Referring more particularly to the drawings, the numeral Iii represents the base portion of the device, having the upstanding lugs H and I2, to which are secured, by rivets l3 and M, the tubes i5 and 53. Supported at the top of tubes l5 and I6 is the inverted U-shaped member I1, having the downwardly projecting lugs l8 and i9, securing the same by means of rivets and 2| to the tubes l5 and H5.

Integral with the member H and at the top thereof is a collar 22, slidingly retaining a rod 23, having the keyway 24, bordered by the calibrations 25. A key 26, secured interiorly of collar 22 by means of screws 2?, engages in keyway 24 and fixes the rod 23 against rotation. The latter 55 drill 34. A guide embraces the tube l5, adja- 5, 1936, Serial No; 99,675

cent to the lower end thereof, and has a tongue 36, extending inwardly through a slot 31, in said tube. A coil expansion spring 38, abutting a pin 39, extending transversely and centrally .of the tube |5 with its upper end, and the tongue 36 with its lower end, serves to maintain a bushing 40 held in the extension 4| of guide 35, against the material to be drilled.

A switch box 42 contains a plurality of mercury switches 43, 44, 45 and 46, of conventional type,

connected in series. Referring to the wiring plan as shown in Fig. 5, the current enters by means of the wire 41 through the main switch 48 and successively through the mercury switches 43, 44, 45 and 45, and through the motor 3| and outwardly by means of wire 49, to complete the circuit. Each of the mercury switches 43, 44, 45 and 46 is mounted on a plate 50 by means of a clip 5|. Each plate 50 is pivoted as at 52 of Fig. 4 and adjustable by means of screws 53 and 54. The rod 23 is notched at 55 to receive the stop lever 56, pivoted at 51 of number H and linked at 58 with a hand lever 59. A stop-collar 60, having the set screw 6 l, embraces the rod 23 and may be fixed to prevent the descent of the drill beyond a desired level.

The base I0 carries the hydrostatic levels 62 and 63 for the guidance of the operator of the drill.

In operation, the device is placed with the base against and on the top of a plurality of layers of cloth to be marked. The handle 59 is then gripped to allow descent of the drill 34. The switch 48 is closed and operation of the motor will ensue, providing the drill is kept on a substantially perfectly vertical line. It will readily be seen that even a slight deviation from the vertical will shift the mercury 64 in one or more of the tubes 43, 44, 45 and 46, thus breaking the circuit between the points 65 and 66 to stop the motor 3|.

The device is capable of many modifications in structure and design without departing from the spirit of the invention within the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent of the United States is:-

1. A device of the class described comprising a base, a standard attached to said base having a collar, a vertical rod mounted in'said collar, a motor fixed dependingly on said rod, a drill extending downwardly from said motor, a switch box on said standard, mercury switches in said switch box connected with said motor, and means for adjusting the individual levels of said mercury switches.

2. In a device of the class described, a base, a standard extending upwardly therefrom, a collar integral with said standard, a rod slidingly embraced in said collar, a notch in said rod, a manually operable stop engaging said notch, a motor drill depending from said rod, a source of current supply, a plurality of mercury switches connected in series between the current supply and the motor, and a main switch intermediate said source and the mercury switches.

3. In a device of the class described, a base, a standard extending upwardly therefrom, a collar integral with said standard, a rod slidingly embraced in said collar, a motor drill depending from said rod, directional levelling mercury switches attached to said standard adjacent said collar and connected with said motor, and means for individual adjustment of said switches.

4. In a device of the class described, a base, a standard fixed thereon, means Vertically slidable in said standard, a motor drill fixed dependingly on said slidable means, hydrostatic levels disposed at right angles for bidirectional action on said base, and mercury switches for said motor disposed on said standard and actuated by the tilting of the latter.

5. In a device of the class described, a base, a standard fixed thereon, means vertically slidable in said standard, a motor drill fixed dependingly on said slidable means, hydrostatic levels disposed at right angles for bidirectional action on said base, mercury switches for said motor disposed on said standard and actuated by the tilting of the latter, and means for individually adjusting said mercury switches.

6. In a motor-driven drill for vertical use, a current supply for said motor, a quadratic rectangular arrangement of mercury switches in said current supply for automatic shut-ofi of the current supply to said drill.

7. In a device of the class described, a rotating tool, a motor for operating the tool, an electrical circuit for operating the motor, mercury switches arranged in a plurality of directions in said circuit for interrupting a current therethrough on the deviations of said device from a given desired alignment.

8. In a device of the class described, a rotating tool, a motor for operating the tool, an electrical circuit for operating the motor, mercury switches arranged in a plurality of directions in saidcircuit for interrupting a current therethrough on the deviations of said device from a given desired alignment, and means for adjusting said mercury switches.

9. In a device of the class described, a rotating tool, a motor for operating the tool, an electrical circuit for operating the motor, mercury switches arranged in a plurality of directions in said circuit for interrupting a current therethrough on the deviations of said device from a. given desired alignment, and means for individually adjusting said mercury switches.

GORDON L. RASHMAN. 

